src/w32heap.h

   1 /* Heap management routines (including unexec) for GNU Emacs on Windows NT.
   2    Copyright (C) 1994, 2001, 2002, 2003, 2004, 2005,
   3                  2006, 2007, 2008, 2009, 2010  Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software: you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation, either version 3 of the License, or
  10 (at your option) any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  19
  20    Geoff Voelker (voelker@cs.washington.edu)                         7-29-94
  21 */
  22
  23 #ifndef NTHEAP_H_
  24 #define NTHEAP_H_
  25
  26 #include <windows.h>
  27
  28 #define ROUND_UP(p, align)   (((DWORD)(p) + (align)-1) & ~((align)-1))
  29 #define ROUND_DOWN(p, align) ((DWORD)(p) & ~((align)-1))
  30
  31 /*
  32  * Heap related stuff.
  33  */
  34 #define get_reserved_heap_size()        reserved_heap_size
  35 #define get_committed_heap_size()       (get_data_end () - get_data_start ())
  36 #define get_heap_start()                get_data_start ()
  37 #define get_heap_end()                  get_data_end ()
  38 #define get_page_size()                 sysinfo_cache.dwPageSize
  39 #define get_allocation_unit()           sysinfo_cache.dwAllocationGranularity
  40 #define get_processor_type()            sysinfo_cache.dwProcessorType
  41 #define get_w32_major_version()         w32_major_version
  42 #define get_w32_minor_version()         w32_minor_version
  43
  44 extern unsigned char *get_data_start();
  45 extern unsigned char *get_data_end();
  46 extern unsigned long  reserved_heap_size;
  47 extern SYSTEM_INFO    sysinfo_cache;
  48 extern OSVERSIONINFO  osinfo_cache;
  49 extern BOOL           using_dynamic_heap;
  50 extern int            w32_major_version;
  51 extern int            w32_minor_version;
  52 extern int            w32_build_number;
  53
  54 enum {
  55   OS_WIN95 = 1,
  56   OS_NT
  57 };
  58
  59 extern int os_subtype;
  60
  61 /* Emulation of Unix sbrk().  */
  62 extern void *sbrk (unsigned long size);
  63
  64 /* Initialize heap structures for sbrk on startup.  */
  65 extern void init_heap ();
  66
  67 /* Round the heap to this size.  */
  68 extern void round_heap (unsigned long size);
  69
  70 /* Cache system info, e.g., the NT page size.  */
  71 extern void cache_system_info (void);
  72
  73 /* ----------------------------------------------------------------- */
  74 /* Useful routines for manipulating memory-mapped files. */
  75
  76 typedef struct file_data {
  77     char          *name;
  78     unsigned long  size;
  79     HANDLE         file;
  80     HANDLE         file_mapping;
  81     unsigned char *file_base;
  82 } file_data;
  83
  84 int open_input_file (file_data *p_file, char *name);
  85 int open_output_file (file_data *p_file, char *name, unsigned long size);
  86 void close_file_data (file_data *p_file);
  87
  88 /* Return pointer to section header for named section. */
  89 IMAGE_SECTION_HEADER * find_section (char * name, IMAGE_NT_HEADERS * nt_header);
  90
  91 /* Return pointer to section header for section containing the given
  92    relative virtual address. */
  93 IMAGE_SECTION_HEADER * rva_to_section (DWORD rva, IMAGE_NT_HEADERS * nt_header);
  94
  95 #endif /* NTHEAP_H_ */
  96
  97 /* arch-tag: 3ba4cbe1-8a09-4a41-8f37-fd31f7426b3c
  98    (do not change this comment) */